In this comprehensive review of over 200 studies of various forms of well-being and cardiovascular health outcomes, Harvard researchers Julia Boehm and Laura Kubzansky discovered that certain psychological traits—optimism, positive emotions and a sense of meaning—offer measurable protection against heart attacks and strokes. These characteristics have been found to slow the progression of cardiovascular disease as well.

Most science fictional and futurist visions of the future tend towards the negative — and for good reason. Our environment is a mess, we have a nasty tendency to misuse technologies, and we’re becoming increasingly capable of destroying ourselves. But civilizational demise is by no means guaranteed. Should we find a way to manage the risks and avoid dystopic outcomes, our far future looks astonishingly bright. Here are seven best-case scenarios for the future of humanity.

We don’t have to engage in grand, heroic actions to participate in the process of change. Small acts, when multiplied by millions of people, can transform the world. Even when we don’t “win,” there is fun and fulfillment in the fact that we have been involved, with other good people, in something worthwhile. We need hope. An optimist isn’t necessarily a blithe, slightly sappy whistler in the dark of our time. To be hopeful in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness. What we choose to emphasize in this complex history will determine our lives. If we see only the worst, it destroys our capacity to do something. If we remember those times and places — and there are so many — where people have behaved magnificently, this gives us the energy to act, and at least the possibility of sending this spinning top of a world in a different direction. And if we do act, in however small a way, we don’t have to wait for some grand utopian future. The future is an infinite succession of presents, and to live now as we think human beings should live, in defiance of all that is bad around us, is itself a marvelous victory.

People think the world is falling apart, and many are in a very dark contemporary mood. But what is curious about this situation is that in nearly every measurable way, the world is much better off than it has ever been.

I am a realist, after all, and I do fret over things I may be able to do little or nothing about directly: economic injustice; wars and the repeated failure to learn from history; our gun-crazy society; the overreliance on tests to spur academic achievement; and attempts to strip women of their reproductive rights.

But I’ve found that life is a lot more pleasant when one looks at the bright side, seeing the glass half full and assuming that reason will eventually prevail.

We don’t have to engage in grand, heroic actions to participate in the process of change. Small acts, when multiplied by millions of people, can transform the world . . . An optimist isn’t necessarily a blithe, slightly sappy whistler in the dark of our time. To be hopeful in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness. What we choose to emphasize in this complex history will determine our lives. If we see only the worst, it destroys our capacity to do something. If we remember those times and places — and there are so many — where people have behaved magnificently, this gives us the energy to act, and at least the possibility of sending this spinning top of a world in a different direction.

Quote of the Moment

Civilization may be unraveling in a lot of areas; some of its structures may be collapsing; but it is also in the midst of a tremendous upheaval of creativity -- a flood of innovation and genius and love pouring out of millions upon millions of people -- a Great Awakening that is far louder and stronger and more interesting than the sleepy resignation and corrosive maliciousness and ignominious decline that the media prefers to focus on.